350-001 Question #173: Real Exam Question with Answer & Explanation

The correct answer is C: Set up a virtual link between area 1 and area 0.. Recall that in OSPF, area 0 is called backbone area and all other areas connect directly to it. In the exhibit above, area 1 is not directly connected with area 0 so we need to set up a virtual link between area 1 & area 0 so that the networks in area 1 can be recognized in area

Question

Refer to the exhibit. How would you get the 1.1.1.1 network into the OSPF database?

Options

AConfigure RTA as an ASBR.
BRedistribute connected routes on RTA into OSPF.
CSet up a virtual link between area 1 and area 0.
DSet up a virtual link between area 1 and area 2.
EAdd a static route into RTB and enter it into OSPF.
FPlace a network 1.1.1.0 0.0.0.0 command into RTB.
GSet up a unique router ID on RTA using an RFC 1918 address.
HChange area 0 on RTB to area 1

Explanation

Recall that in OSPF, area 0 is called backbone area and all other areas connect directly to it. In the exhibit above, area 1 is not directly connected with area 0 so we need to set up a virtual link between area 1 & area 0 so that the networks in area 1 can be recognized in area 0. The virtual- link configuration is shown below: RTB(config)#router ospf 1 RTB(config-router)#area 2 virtual-link 1.1.1.1 RTA(config)#router ospf 1 RTA(config-router)#area 2 virtual-link 2.2.2.2 Notice that the router-id in the "area ... virtual-link " command is the router-id of the neighboring

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